Distance From Ulsan Airport to London Heathrow Airport, USN - LHR Distance

The distance from Ulsan Airport (USN) to London Heathrow Airport (LHR) is 5699 miles or 9171 kilometers or 4949 nautical miles.

The distance shown below is direct flight distance between airports. Straight-line distance does not account for the surface between the two points. It is the distance a bird or airplane would travel between the two points when flying above the surface. The straight line distance is the direct route between two points, regardless of whether or not there are roads that connect them.

---

How long does it take to travel from Ulsan ( South Korea ) to London ( United Kingdom )?

A one-way nonstop (direct) flight between Ulsan and London takes around 13 hours 6 minutes.

Estimated flight time from Ulsan Airport, Ulsan, South Korea to London Heathrow Airport, London, United Kingdom is 13 hours 6 minutes under avarage conditions. Your actual flying time may vary depending on wind direction/speed or weather conditions. This calculation does not include the departure and landing times of the aircraft. In addition, it does not cover the person identity check, ticket check-in and baggage collection times at the airport.

Travel Distance Between the Airports • USN - LHR

Kilometers		9171 km
Statute Miles		5699 miles
Nautical Miles		4949 nm
Avg. Time of Flight		13 hours 6 minutes

Ulsan Airport to London Heathrow Airport Flight Route Map - USN to LHR Flight Path

Location of Ulsan Airport & London Heathrow Airport is given below.
Click the map to view Ulsan to London nonstop flight path and travel direction.

Click to see flight route on Google Map between Ulsan, South Korea and London, United Kingdom. .

Nonstop flight route between Ulsan, South Korea and London, United Kingdom.

Time Difference Between the Airports • USN - LHR

Time difference between Ulsan (South Korea) and London (United Kingdom) is 9 Hours.
London time is 9 Hours behind Ulsan.

Location	Local Time
Ulsan (South Korea)	2026-03-18, 16:05:46 KST
London (United Kingdom)	2026-03-18, 07:05:46 GMT

Why should you arrive 3 hours before international flight? Flyers who are traveling to an international destination should arrive at the airport earlier than domestic flyers. This is because international flights can have additional check-in requirements, like passport verification, that need to be completed before you receive your boarding pass.

Origin

Ulsan Airport (USN / RKPU) Ulsan, South Korea

Destination

London Heathrow Airport (LHR / EGLL) London, United Kingdom